'The foregoing developments, now widely discussed in the psychoanalytic literature, influenced my approach in organizing these lectures. If within the bastions of "hard" science, inner experience has become a legitimate topic of discussion; if even the major figures in the world of physics - Einstein, Heisenberg, Pauli, and Bohm - could publicly acknowledge a spiritual perspective, perhaps the time was ripe to attempt a modest resumption of the aborted collaboration between Freud and Jung?'- Nathan Field from the Introduction